If you run the OS off ramdrive (initrd; of course this would have to be a compact system using busybox and such), you can also have a free SD slot, as soon as its done booting. NAND may still be faster, I'm a bit wary of testing that personally though (after I get another netbook as a backup though...) I'm lazy so what I've been doing if I need an extra slot is to use USB. Also I haven't written off Windows CE entirely yet so I keep it around on NAND to try things on (FWIW CE boots in 30 seconds, and I think linux could too with some work).

Everybody can make a software for SD card to boot and format /data partition into native FS?
I try to install linux(debian) to /data (format into ext2and copy files), but then it can't boot, and I cannot install stock firmware. Can it be becouse I have broken TS?

Everybody can make a software for SD card to boot and format /data partition into native FS?I try to install linux(debian) to /data (format into ext2and copy files), but then it can't boot, and I cannot install stock firmware. Can it be becouse I have broken TS?